The difference between the pT chart of CO2 and ethylene is pretty big. I don't think a 1/2 hp compressor can pull it. Check the pT chart of ethyleneOriginally Posted by gkiing
The difference between the pT chart of CO2 and ethylene is pretty big. I don't think a 1/2 hp compressor can pull it. Check the pT chart of ethylene
count me in
compressor: 1/5 hp techumseh (i'm pretty sure it's 1/5 hp, it came from a large fridge/ freezer)
refrigerants: r290/ CO2
Don't bother using anything less than 1/2hp, I tried 1/4hp and there isint eneough power to condense the CO2 while under any load, it jneeds a larger compressor. Just trying to save you hours and hours of tinkering and frustration.
gkiing, if I remember correctly, you did use a capillary tube for HX. I'm sure
you know that this metering device is very restrictive :P: Any mechanical
expansion valves (PEV, TXV etc.) should let autocascade to working properly
with 1/4 HP compressor
it is as restrictive as you make it. It's purpose is to be restrictiveI doubt if you can get an autocascade working efficient with a 1/4HP compressor.
Just not enough mass flow
cool cool cool!
I was doubting if autocascade with 1/4 HP compressor and TXV/PEV on HX can condense CO2 at load
1/4 isint eneough, even with a txv. On my autocascade v2 (not posted here) i tried a new condenser and hx, and even with a larger hx and more surface area (used corrugated copper pipe) it couldnt hold a load. I think at least 1/2hp is needed to maintain -30 on the hx under load.I was doubting if autocascade with 1/4 HP compressor and TXV/PEV on HX can condense CO2 at load
thats alright i just wanna make an autocascade work and try some ideas that have been in the back of my head for some time
it wont work well with that small a compressor. You will be in a VERY frustrated, to say the least.
Last edited by gkiing; 03-17-2005 at 10:33 PM.
Is the comp still going. I was thinking of entering in the 1hp R290 R744 class
i think it was ment to run for 6months.
this thread started on 20 november 2004,so i guess it ends on the 20 may plenty of time left.
-83.5c is the temp to beat
Last edited by kayl; 04-16-2005 at 04:25 AM.
Have you got a linky for that temp?
Russell hq, I am pretty sure that they are still "recruting"... Contact Berkut
http://www.xtremesystems.org/forums/...8&page=2&pp=25
happened tonight. will be updating thread with pics wednesday will borrow a
camera to get some temp pics
yep, it's still going.
THE CONtEST WILL END NEXT WEEK, SUNDAY IS THE LAST DAY
22/05/2005
can we have an update of whos coming where.
also what prizes are there for each place??
Haha, you guys are insane. I hope I can eventually do this...
If you have a cooling question or concern feel free to contact me.
bump? updates
Sunday
With new autocascade designs shouldn't at least a pressure releif valve be mandatory. make everyone buy one then they will always have them to use. That way no one will split something open. I can still picture that one guys seperator that was distorted. It was a few psi away from splitting. Should find that pic and post it to remind people what pressure can do. "work safe" Walt
guess I should have looked at the dates LOL,its over!!!! LOL
berkut - i made my autocascade but i dont count
Raven155 - made a working autocascade but never posted results on XS afaik
runmc - impressive parts but i dont remember any completed system
gkiing - cant find any posted results, please PM me
bh2k - --------||-----------
kayl - i think he is our winner
jan pm me
Epsilon pm me
hatemi pm me
Tonic never finished
JSU pm me
i give up, autocascade wont work with co2 and 404a, my autocascade hx is worthless...
-55C on my system was more funny than cold
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